Any two of you typically have an estimated 0.1% difference in your nucleotide sequences, which is equivalent to about 3 million nucleotide differences (3 billion base pairs in the human genome). these differences are the basis of the snps used to construct genetic linkage maps. some of these snps actually lie in the region of the dna that codes for the protein, yet they have no effect on the phenotype of individuals carrying the snp on both homologous chromosomes. of the following answer which is the most probable? ?
a) in all cases they code for the same amino acid., and that is why these are tolerated.
b) the wobble nature of the genetic code can tolerate these differences.
c) amino acid substitutions in some cases will happen but they will still permit the eventual protein to function.
d) there are always other duplicate genes which can substitute for their defective copies.
e) none of the above.